Plastic drainage board production process on the tight configuration (a) waterproof thermal insulation of high density polyethylene (HDPE) has a good watertight, heat insulation, high strength, flexible, moisture resistant. Can effectively reduce the indoor 14 db, 500Hz noise, a significant noise reduction effect. (Two) hydraulic conductivity water drain convex co-determines the size of the gap between the drainage capacity and air thickness, drainage board a variety of models with a variety of water drainage, the slope of the different substrates with different displacement, for the design personnel selection. (Three) High flexibility and compressive strength drainage board production process on the tight configuration, bosses, structural design is reasonable, the deployment of chemical ingredients to make a high-density polyethylene drainage board softness, but also has a high impact poly styrene hardness, strength and secure the drainage board, soft moderate will easily handling, transportation, laying and construction. (Iv) Root puncture resistance properties: (HDPE) drainage board itself ingredient is high density polyethylene (HDPE), high density polyethylene itself puncture resistant plant roots, in the cultivation of the application of polyethylene drain plate prevents the roots of growing plants on the waterproof layer, structural roof damage, thus fundamentally prevent roof leaks; (five) high stability and strong resistance to corrosion: High density polyethylene product performance and stability, degradation of life itself is 300 years, it is completely possible and structures with life; chemical resistant high-density polyethylene, the natural environment and general industrial environments acid, alkali and salt corrosion is not causing damage.